Sound-reproducing machine



F- CHENEY.

Patented Oct. 25, 1921.

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UNITE-D sra'l es PATENT I'OREST CHENEY, OF CHICAGO, ILLDTOIS, ASSIG-NORTO CHENEY TALKING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.

sounn-nnrnonncme MACHINE.

Application 11166 August 11, 1917.

To all whom it may concern Be it known that I, FoREs'r CHENEY, a

, citizen of the United States, and resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Sound-Reproducing Machines, of which the following is aspecification- This invention relates to sound re-producing machines,and more particularly to sound amplifier means therefor.

As is well known to those skilled in the art, while the initialvibrations of the diaphragm of such machines potentially set up all ofthe complex air vibrations necessary to produce the fundamental tonesand overtones going to make up the character and cial operation.

These and other objects are accomplished by providing in a soundreproducing machine a sound chamber having an inlet and an outlet, thelatter of which is smaller than the inlet.

The invention is illustrated on the accompanying sheet of drawings inwhich,

Figure 1 is a fragmentary plan view of a sound reproducing machineembodying my invention;

Fig. 2 is a fragmentary rear elevation of the same machine, and

Fig. 3 is a detail sectional view taken in the plane of line 33 of Fig.2.

The various novel features of the invention will be apparent from thefollowing description and drawings, and will be particularly pointcd'outin the appended claims.

In order to reproduce sound which is pleasing to the ear and which maybe carried a relatively great distance, for example, in a concert hall.it is necessary that the volume of the sound reproducing machine besufficiently great. The quality of the sound or Specification of LettersPatent.

Patented Oct. 25, 1921.

Serial No. 185,659.

tone is dependent upon volume. hen I speak of volume, I mean fullness oftone as distinguished from loudness.

I have illustrated my invention in connection with a sound reproducingmachine 10 having means for rotating a record 11 operatlvely associatedwith which is a sound box 12 to which is connected a sound or tone arm13, the latter of which is preferably constructed in accordance with thearrangement disclosed in my Patent No. 1,170,802, granted February 8,1916. The final section 14 of the tone arm 13 is preferably curved to anangle of 90 degrees forming an elbow, and the lower end thereof has aflange or enlargement 15 which rests upon the top 16 of a cabinet. Thefinal section 14 of the tone arm communicates with the inlet opening ofa sound member or distributer 17, the size of the inlet opening beingindicated by the area inclosed by the four walls of the distributer 17,shown in Fig. 3.

I have found by experiment that the volume of sound-reproducing machinesmay be greatly increased for developing fuller and richer tones ofimproved quality by providing the throat of the machine, which in thisinstance I call the distributer 17, with a plurality of sound outlets,the size of each of which is less than the size of the inlet of thedistributer. To this end I have provided a distributer 17 with aplurality of oppositely arranged sound outlets 18 which register withtone amplifyingconduits or members 19, the final sections 20 of whichare in the form of elbows which register with orchestral sections 21preferably constructed in acordance with m Patent No. 1,17 0,800,granted February 8, 1916. These orchestral sections register withresonators 22, which in this instance are supported on the top 16.

By means of this arrangement wherein the distributing chamber isprovided with a plurality of sound outlets, the size of each of which issmaller than the sound inlet of the distributing chamber, it is possibleto greatly increase the volume, quality, fullness and richness of atone. In this particular instance I have provided the sound distributer17 with two sound outlets. However, it is h be understood that thisnumber may he d creased to one or increased if so desired withoutdeparture from the scope of my invention.

There may be various modifications of my invention as hereinparticularly shown and described, and it is my intention to cover allsuch modifications which do not depart from the spirit and scope of theinvention as set forth in the following claims.

I claim:

1'. In a talking machine, the combination with a sound producing device,of a tone arm, a sound distributing chamber having an inlet opening anda plurality of outlet openings each of less cross-section than the inletopening, a sound conduit leading from the tone arm to the inlet of saiddistributing chamber, and a plurality of sound amplifiers, onecommunicating with each of said outlet openings.

2. In a talking machine, the combination with a sound producing device,of a tone arm, a cubical sound distributing chamber having an inletopening and a plurality of outlet openings each of less cross-sectionthan the inlet'opening, a sound conduit leading from the tone arm to theinlet of said -distributing chamber,- and a plurality of.

sound amplifiers, one communicating with each of said outlet openings.

, 3. In a talking machine, the combination with a sound producingdevice, of a tone arm, a sound distributing chamber having an inletopening and a plurality of outlet openings each ofless cross-sectionthan the inlet opening, a sound conduit leading from. the tone arm tothe inlet of said distributing chamber, a plurality of sound conduits,one leading from each of said outlet openings, and a plurality of soundamplifiers, one communicating with each of said plurality of soundconduits.

4. In a talking machine, the combination with a sound producing device,of a tone arm, a sound distributing chamber having an inlet opening anda plurality of outlet openings of a combined cross-sectional area lessthan the cross-sectional area of said inlet opening, a sound conduitleading from the tone arm to the inlet of said distributing chamber, anda plurallty of sound amplifiers, one communicating with each of saidoutlet openings.

Signed at Chicago, Illinois, this th day of July, 1917.

FOREST CHENEY.

Witnesses:

A. F. WADE, CHAS. L. BY'RoN.

